SMAA is even better and faster than FXAA.
http://www.iryoku.com/smaa/
Also there is software that automatically injects SMAA into your d3d9, d3d10 or d3d11 games: http://mrhaandi.blogspot.com/p/injectsmaa.html

Anti-aliasing has an intimidating name, but what it does for our computer displays is rather fundamental. Think of it this way -- a line has infinite resolution, but our digital displays do not. So when we "snap" a line to the pixel grid on our display, we can compensate by imagineering partial ...